CPC G08B 21/182 (2013.01) [G08B 21/22 (2013.01)] | 38 Claims |
1. An indicator device for detecting the presence of another device and alerting a user of the indicator device, the indicator device comprising:
a housing comprising a substantially planar body;
an electrical power source;
a proximity sensor configured to detect the presence of the other device within a spherical range of the indicator device; and
one or more indicator elements operable to alert the user of the indicator device;
wherein the proximity sensor is configured to operate the, or each, indicator element if the distance between the indicator device and the other device is below a predetermined value, wherein the predetermined value is a radius of the spherical range.
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